a scientist who studies bacteria, especially those that cause disease

She is a physician and a bacteriologist working at a university laboratory. 她是一名医生，也是一名在大学实验室工作的细菌学家。

It is a bacterium that is difficult to work with, and bacteriologists have never been able to grow it successfully. 这是一种难以处理的细菌，细菌学家从未能够成功地培养它。